Divide Equal SubBasic Extensions Class

```Public Sub DivideEqual( _
ByRef rLeft As Variant _
, ByVal vRight As Variant _
)```

"Divide Equals" or "Assign Division" Divide rLeft by vRight and assign the result back into rLeft. Similar to the C language "/=" operator.

Summary: This function is usually faster than the macroized eqivalent ("rLeft = rLeft / vRight") if rLeft is not a simple variable. This is because rLeft is passed-by-reference so that Visual Basic must only evaluate its address once.
Example #1 (valid example):
```    Assuming
Dim dblValue As Double
dblValue = 2.5
for example
DivideEqual dblValue, 2
leaves
dblValue = 1.25```
Example #2: (bad example; has no effect; see below)
```    Assuming
Dim dblValue As Double
dblValue = 2.5
for example
DivideEqual (dblValue), 2
leaves
dblValue = 2.5```
```    DivideEqualFn Function
DivideOnErrRtnZero Function
Div Function
TimesEqual Subroutine
PlusEqual Subroutine
MinusEqual Subroutine```
Definition (Visual Basic):
`    rLeft = rLeft / vRight`
Definition (C):
`    rLeft /= vRight;`
rLeft: Numeric or date value which is divided by vRight. The result of the division is assigned back into the variable passed via rLeft, unless that value happens to be passed-by-value as in example #2.
vRight: The numeric value by which rLeft is divided.
Note: We would NOT use this subroutine to replace something like "dblValue = dblValue / 2", but we WOULD use it to replace something like "adblMatrix(intColumn, intRow, intItem) = adblMatrix(intColumn, intRow, intItem) / 2", especially since we only have to mention the "adblMatrix(intColumn, intRow, intItem)" part once.